Why does neon have isotopes

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Ott U Planetary and pre-solar noble gases in meteorites. We also have ongoing projects to analyze natural samples and compare the results to other systems and known geologic histories. Nucleogenic neon is produced indirectly by radioactive decay. The radium-series, thorium-series, and actinium-series decay chains of uranium, thorium, and uranium, respectively, emit alpha particles while decaying to the stable lead isotopes lead, lead, and lead Most of these alpha particles come to rest as helium A small proportion of the alpha particles react with other elements like oxygen and fluorine.

The production rate and isotopic composition of nucleogenic neon depend on the composition of the material and the energies of the incident alpha particles, but they tend to be of the order of 10 -8 per alpha particle. Production rates of neon and neon are currently calculated using calculated reaction cross section and mineral stopping power data that has not been verified experimentally. The 20 Ne-enriched components were attributed to exotic primordial rare gas components in the Earth, possibly representing solar neon.

Elevated 20 Ne abundances were also found in diamonds Honda et al. Source of text: This review was assembled by Eric Caldwell, primarily from Dicken Allegre, C. Black, D. Carbonaceous chondrites. Acta , 36 : Craig, H. Dicken, A. Radiogenic Isotope Geology. Cambridge University Press, New York, p.